True, it is cheating, but if I can find a better way to fix it I'll turn that back on. I adjusted the map size of the lights and it did make a difference. Guess I'll just keep experimenting. (Also, I'm pretty sure it's the tank top, because if you apply another non-mesh MAT or take the tank off completely, there are no blotches.) Thank you for the tip though. I usually don't pay much attention to lights. Maybe now I will. :)